What condition is treated by antiviral medications?

Antiviral medications are specifically designed to treat viral infections, making this the correct choice. These medications work by inhibiting the development and replication of viruses, thereby helping to reduce the severity and duration of viral illnesses. Examples of viral infections treated with antiviral medications include influenza, HIV/AIDS, herpes simplex virus, and hepatitis.

Bacterial infections, on the other hand, are treated with antibiotics, which are effective against bacteria, not viruses. Fungal infections are treated with antifungal medications, and allergic reactions typically require antihistamines or corticosteroids rather than antiviral treatment. Thus, antiviral medications are solely targeted at combating infections caused by viruses, reinforcing why the answer is correct.